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Printable Handouts
Navigable Slide Index
- Introduction
- Mediastinum (1)
- Mediastinum (2)
- Boundaries of mediastinum
- Divisions of mediastinum (1)
- Divisions of mediastinum (2)
- Superior thoracic inlet
- Transverse thoracic plane
- Sternal angle
- Superior mediastinum
- Boundaries of superior mediastinum
- Superior mediastinum contents
- Anterior mediastinum
- Boundaries of anterior mediastinum
- Anterior mediastinum contents
- Middle mediastinum
- Boundaries of middle mediastinum
- Middle mediastinum contents
- Posterior mediastinum
- Boundaries of posterior mediastinum
- Posterior mediastinum contents
- Thank you
Topics Covered
- Definition of the mediastinum
- The major divisions of mediastinum: superior and inferior
- The subdivisions of mediastinum: posterior, anterior and middle mediastinum
- The contents of mediastinum
Talk Citation
Stephens, S. (2020, January 30). Mediastinum [Video file]. In The Biomedical & Life Sciences Collection, Henry Stewart Talks. Retrieved October 11, 2024, from https://doi.org/10.69645/FUUF6231.Export Citation (RIS)
Publication History
Financial Disclosures
- None.
Other Talks in the Series: Introduction to Gross Anatomy for Medicine
Transcript
Please wait while the transcript is being prepared...
0:00
Hello, I'm Dr. Stephens.
I'm clinical anatomist and a lecturer in anatomy from Cardiff University.
Welcome to my talk on mediastinum.
0:13
So the learning outcomes for this talk are: By the end of the lecture,
you should be able to; define mediastinum,
understand major divisions of the mediastinum.
You should be able to appreciate subdivisions of
mediastinum and recognize and name the contents of the mediastinum.
0:34
So what is mediastinum?
If you look at this image,
you can see the central region is shaded green
while the lungs and pleurae are shaded pink.
So essentially mediastinum is that region within
the thoracic cavity wherein if you remove the lungs and the pleurae,
whatever is left behind would be the mediastinum.
Essentially, on this diagram,
if you take out the lungs and the pleurae which are
shaded in purple on whatever is remaining,
the green region in the center would be the mediastinum.
1:10
Boundaries of the mediastinum.
So this is essentially the extent of the mediastinum.
So vertically it extends from the superior thoracic aperture to
the diaphragm and horizontally from the thoracic vertebrae to the body of the sternum.
1:28
Let's look at the divisions of the mediastinum.
Mediastinum has got two major divisions,
namely, the superior and inferior mediastinum.
While the inferior mediastinum is subdivided into three,
namely, the anterior media and the posterior mediastinum.
Just to get the concept a bit more clearer,
let refer to this diagram on the right.
If you look here, you can see at the top,
the region that is shaded green,
which would be the superior mediastinum and
all that region would be the inferior mediastinum,
which is further divided into anterior mediastinum,
which is shaded dark green here.
Middle mediastinum, which is mainly the heart and the pericardium,
which is shaded light blue here and that lies
posterior to the heart and pericardium would be the posterior mediastinum.